
Many of you have emailed me to ask me how to tell a betta Monsieur from a betta Madame. In other words (plain English, and pardon my French :) ) how to tell a male from a female. Ahhhh the precious eye of the experienced breeder! That eye only can tell without a doubt the settle differences between a female and a young male who is trying to pass as a female, or a young male and a female who is trying to pass herself as a male… I guess what I am trying to say is that it is often hard to sex young bettas (or that bettas are transvestites? :P). Usually, you can look up closely to a betta and if it is wearing lipstick, it is a female. If, however, it has lipstick on it’s gill covers, then it is a male. LOL OK, so I’m pulling your leg, bettas don’t wear lipstick (sheeesh, I wish they did, it would sure make our sexing job easier!!). However, since they don’t, here are a few other pointers to help you out (for real this time):

Examine the anal fin of young bettas. If it is starting to look longer than it did before, and kinda pointy at the end, then you could be in the presence of a future macho male betta :).
Male’s bodies are less wide, and more elongated. Yeah, yeah, I know it sounds like Chinese. It did sound like Chinese to me to when I first started breeding bettas. Now I get it. It is true that the body shapes look slightly different. But it is not the easiest way to sex bettas. After looking at thousands and thousands of bettas, you too will see it. (or need glasses).

BEHAVIORAL DIFFERENCES
Males blow bubble nests. (hopefully :) ). Females don’t. If you are unsure of a betta’s sex, you might want to jar it. If it blows a nest (see photo below) a few days later, then it was a male. If it doesn’t, it could still be a male who just is too darn lazy for his own good :).
